You should be modded up. Anyone that has even owned a car and tried to fix it themselves (even with a great deal of automotive and electronics knowledge) will tell you how ridiculous it is to work on a car. If it's ten years old there may be a chance of finding a good bit of the parts you need, but older than that and everything has changed so much that you might as well buy a newer car and spend less money than trying to find parts and fix something. Sure, there are standard parts for certain eras of cars, like my E39 BMW, but once the manufacturer moves to a new series for a model, like the E60, then all the stuff around, over and under the hood changes and is only "standard" to that series. Now translate that across all vehicle manufacturers during those changes and you have a ridiculous number of custom/proprietary parts.